我厂工具车间制造的铣床刀杆,以前都是采用将两端中心孔顶住,再以百分表测量锥体与圆柱面的不同心度(见图)。用这种方法检验后的合格品,往往在使用时发现安装的刀具经常产生偏斜,以致在加工时发生崩 Milling machine tool bar made by our factory tool workshop used to hold the center hole at both ends before, and then use the dial indicator to measure the concentricity of the cone and the cylindrical surface (see picture). Qualified products tested in this way tend to be found to be skewed frequently during use, resulting in collapse during processing